SMAJ HV SERIES creat by art 400 Watts Suface Mount Transient Voltage Suppressor SMA/DO-214AC Pb RoHS COMPLIANCE Features For surface mounted application Low profile package Built-in strain relief Glass passivated junction Excellent clamping capability Fast response time: Typically less than 1.0ps from 0 volt to BV min Typical IR less than 1uA above 10V High temperature soldering guaranteed: 260 / 10 seconds at terminals Plastic material used carried Underwriters Laboratory Flammability Classification 94V-0 400 watts peak pulse power capability with a 10 / 1000 us waveform (300W above 78V) Green compound with suffix "G" on packing code & prefix "G" on datecode Mechanical Data Dimensions in inches and (millimeters) Marking Diagram Case: Molded plastic Terminals: Pure tin plated, lead free XX Polarity: Indicated by cathode band G = Green Compound Packaging: 12mm tape per EIA Std RS-481 Y = Year Weight: 0.064 gram M = Work Month = Specific Device Code Maximum Ratings and Electrical Characteristics Rating at 25 ambient temperature unless otherwise specified. Type Number Symbol Value Unit Peak Power Dissipation at TA=25, Tp=1ms(Note 1) PPK 400 Watts Steady State Power Dissipation PD 1 Watts Peak Forward Surge Current, 8.3ms Single Half Sine-wave Superimposed on Rated Load (JEDEC method) IFSM 40 Amps VF 3.5 Volts TJ, TSTG -55 to +150 Maximum Instantaneous Forward Voltage at 25.0A for Unidirectional Only Operating and Storage Temperature Range Note 1: Non-repetitive Current Pulse Per Fig. 3 and Derated above TA=25 Per Fig. 2 Version:B12 RATINGS AND CHARACTERISTIC CURVES (SMAJ HV SERIES) FIG. 1 PEAK PULSE POWER RATING CURVE FIG.2 PULSE DERATING CURVE PEAK PULSE POWER(PPP) OR CURRENT (IPP) A DERATING IN PERCENTAGE (%) PPPM, PEAK PULSE POWER, KW 100 NON-REPETITIVE PULSE WAVEFORM SHOWN in FIG.3 TA = 25 10 1 125 100 75 50 25 0 0.1 0.1 1 10 100 1000 0 10000 FIG. 3 CLAMPING POWER PULSE WAVEFORM IFSM, PEAK FORWARD SURGE A CURRENT (A) PEAK PULSE CURRENT (%) 120 Peak Value IPPM 100 Half Value-IPPM/2 10/1000usec, WAVEFORM as DEFINED by R.E.A. 80 75 100 125 150 175 200 FIG. 4 MAXIMUM NON-REPETITIVE FORWARD SURGE CURRENT UNIDIRECTIONAL ONLY 50 PULSE WIDTH(td) is DEFINED as the POINT WHERE the PEAK CURRENT DECAYS to 50% OF IPPM tr=10usec 50 TA, AMBIENT TEMPERATURE (oC) tp, PULSE WIDTH, (uS) 140 25 60 40 20 8.3mS Single Half Sine Wave JEDEC Method 40 30 20 10 td 0 0 0.5 1 1.5 2 2.5 3 3.5 4 t, TIME ms 0 1 10 NUMBER OF CYCLES AT 60 Hz CJ, JUNCTION CAPACITANCE (pF) A FIG. 5 TYPICAL JUNCTION CAPACITANCE 10000 MEASURED AT ZERO BIAS 1000 100 TA=25 f=1.0MHz Vsig=50mVp-p MEASURED at STAND-OFF VOLTAGE,Vwm 10 1 10 100 V(BR), BREAKDOWN VOLTAGE (V) Version:B12 100 ELECTRICAL CHARACTERISTICS (TA=25 unless otherwise noted) Working Peak Reverse Voltage VWM Maximum Maximum Peak Pulse Reverse Leakage Surge Current @ VWM IPPM ID (uA) (A)(Note5) 1.2 1 SMAJ200A SV 200 224 247 1 Maximum Clamping Voltage at IPPM Vc(V) (Note5) 324 SMAJ220A SX 220 246 272 1 356 1.1 1 SMAJ250A SZ 250 279 309 1 405 1.0 1 SMAJ300A TE 300 335 371 1 486 0.8 1 SMAJ350A TG 350 391 432 1 567 0.7 1 SMAJ400A TK 400 447 494 1 648 0.6 1 Device Device Marking Code Breakdown Voltage Test VBR (V) Current at IT Min IT Max (mA) Notes: 1. Non-repetitive current pulse, per Fig. 3 and derated above T A=25 per Fig. 2 2. Measure on 8.3ms single half sine-wave duty cycle=4 pulses per minutes maximum 3. Peak pulse power waveform is 10/1000 us Version:B12 TVS APPLICATION NOTES: Transient Voltage Suppressors may be used at various points in a circuit to provide various degrees of protection. The following is a typical linear power supply with transient voltage suppressor units plaved at different points. All provide protection Transient Voltage Suppressor 1 provides maximum protection. However, the system will probably require replacement of the line fuse(F) since it provides a dominant portion of the series impedance when a surge is encountered. Hower, we do not recommend to use the TVS diode here, unless we can know the electric circuit impedance and the magnitude of surge rushed into the circuit. Otherwise the TVS diode is easy to be destroyed by voltage surge. Transient Voltage Suppressor 2 provides execllent protection of circuitry excluding the transformer(T). However, since the transformer is a large part of the series impedance, the chance of the line fuse opening during the surge condition is reduced. Transient Voltage Suppressor 3 provides the load with complete protection. It uses a unidirectional Transient Voltage Suppressor, which is a cost advantage. The series impedance now includes the line fuse, transformer, and bridge rectifier(B) so failure Any combination of this three, or any one of these applivations, will prevent damage to the load. This would require varying trade-offs in power supply protection versus maintenance(changing the time fuse). An additional method is to utilize the Trans RECOMMENDED PAD SIZES The pad dimensions should be 0.010"(0.25mm) longer than the contact size, in the lead axis. This allows a solder filler to form, see figure below. Contact factort for soldering methods. Version : B12